Optocouplers / Photocouplers

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OptoMOS 1-Form-A (SPST-NO) Solid State Relays

Littelfuse offers an extensive portfolio of 1-Form-A (SPST-NO) Solid State Relays (SSRs) in various PC board-mount package sizes. These relays feature load current ratings from 50mA to 9A (20A with heat sink), and 30V to 1000V load voltage ratings. 1-Form-A relays are available in SOP-4, SIP-4, SMD DIP-4, SMD DIP-6, SOIC-16, Power i4-PAC, and ISOPLUS-264 packages. Fault-protected SSRs with active current limit and thermal shutdown are also available from Littelfuse to offer robust and rugged switching solutions.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (PEN) Filter the results in the table by unit price based on your quantity.	Qty.	Mounting Style	Package / Case	Number of Channels	Output Type
Solid State Relays - PCB Mount 1-Form-A 60V 1000 mA SSR w/optic MOSFET LCA710STR IXYS Integrated Circuits 1: S/ 39.08 4,817In Stock	Mfr. Part # LCA710STR Mouser Part # 849-LCA710STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 1000 mA SSR w/optic MOSFET Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	4,817In Stock	Cut Tape S/ 39.08 S/ 36.63 S/ 32.58 S/ 30.95 View Reel S/ 24.99 S/ 29.31 S/ 26.82 S/ 25.89 S/ 24.99 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-6		MOSFET
Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET LCA715STR IXYS Integrated Circuits 1: S/ 42.08 4,158In Stock 5,000Expected 6/16/2027	Mfr. Part # LCA715STR Mouser Part # 849-LCA715STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	4,158In Stock 5,000Expected 6/16/2027	Cut Tape S/ 42.08 S/ 37.48 S/ 35.81 S/ 34.57 View Reel S/ 29.04 S/ 33.40 S/ 31.80 S/ 30.71 S/ 29.04 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-6		MOSFET
Solid State Relays - PCB Mount 1-Form-A SSR 4-Pin SOP CPC1006NTR IXYS Integrated Circuits 1: S/ 8.33 30,777In Stock End of Life	Mfr. Part # CPC1006NTR Mouser Part # 849-CPC1006NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A SSR 4-Pin SOP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	30,777In Stock	Cut Tape S/ 8.33 S/ 8.02 S/ 7.63 S/ 7.36 Reel S/ 5.92 View S/ 7.08 S/ 6.73 S/ 6.54 S/ 5.92 S/ 5.68 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount 250V, 1-Form-A SSR CPC1010NTR IXYS Integrated Circuits 1: S/ 15.22 9,284In Stock 6,000Expected 5/24/2027 End of Life	Mfr. Part # CPC1010NTR Mouser Part # 849-CPC1010NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 250V, 1-Form-A SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	9,284In Stock 6,000Expected 5/24/2027	Cut Tape S/ 15.22 S/ 13.55 S/ 12.96 S/ 12.42 View Reel S/ 10.63 S/ 11.99 S/ 11.44 S/ 11.05 S/ 10.67 S/ 10.63 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount SPNO RELAY CPC1017N IXYS Integrated Circuits 1: S/ 3.35 189,535In Stock 120,000Expected 5/12/2027 End of Life	Mfr. Part # CPC1017N Mouser Part # 849-CPC1017N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPNO RELAY Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	189,535In Stock 120,000Expected 5/12/2027	S/ 3.35 S/ 2.99 S/ 2.88 S/ 2.30 View S/ 2.21 S/ 2.17 S/ 2.07	Min.: 1 Mult.: 1	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount 1-Form-A 60V 750mA Solid State Relay CPC1019NTR IXYS Integrated Circuits 1: S/ 15.22 61,647In Stock End of Life	Mfr. Part # CPC1019NTR Mouser Part # 849-CPC1019NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 750mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	61,647In Stock	Cut Tape S/ 15.22 S/ 13.55 S/ 12.96 S/ 12.46 View Reel S/ 10.35 S/ 12.03 S/ 11.48 S/ 11.09 S/ 10.70 S/ 10.35 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount RELAY OPTO NSOIC4 30V 1.2A CPC1020N IXYS Integrated Circuits 1: S/ 26.16 34,160In Stock End of Life	Mfr. Part # CPC1020N Mouser Part # 849-CPC1020N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount RELAY OPTO NSOIC4 30V 1.2A Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	34,160In Stock	S/ 26.16 S/ 23.36 S/ 22.07 S/ 21.14 View S/ 19.81 S/ 18.72 S/ 17.20	Min.: 1 Mult.: 1	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount 1-Form-A 30V 1200V Solid State Relay CPC1020NTR IXYS Integrated Circuits 1: S/ 23.59 104,021In Stock End of Life	Mfr. Part # CPC1020NTR Mouser Part # 849-CPC1020NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 30V 1200V Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	104,021In Stock	Cut Tape S/ 23.59 S/ 21.02 S/ 20.09 S/ 19.38 View Reel S/ 16.58 S/ 18.72 S/ 17.83 S/ 17.20 S/ 16.82 S/ 16.58 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay CPC1025N IXYS Integrated Circuits 1: S/ 12.61 7,425In Stock 400Expected 7/30/2027 End of Life	Mfr. Part # CPC1025N Mouser Part # 849-CPC1025N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 400V 120mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	7,425In Stock 400Expected 7/30/2027	S/ 12.61 S/ 11.25 S/ 10.70 S/ 10.35 View S/ 9.93 S/ 9.46 S/ 9.15 S/ 8.84	Min.: 1 Mult.: 1	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount SPST-NO 4PIN SOP CPC1230N IXYS Integrated Circuits 1: S/ 14.64 1,753In Stock End of Life	Mfr. Part # CPC1230N Mouser Part # 849-CPC1230N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST-NO 4PIN SOP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,753In Stock	S/ 14.64 S/ 13.35 S/ 12.26 S/ 11.64 View S/ 11.25 S/ 10.70 S/ 10.39 S/ 9.73 S/ 9.42	Min.: 1 Mult.: 1	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount 1-Form-A 350V 120mA Solid State Relay CPC1230NTR IXYS Integrated Circuits 1: S/ 13.55 2,649In Stock End of Life	Mfr. Part # CPC1230NTR Mouser Part # 849-CPC1230NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 350V 120mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	2,649In Stock	Cut Tape S/ 13.55 S/ 12.69 S/ 11.29 S/ 10.78 View Reel S/ 9.30 S/ 10.43 S/ 9.96 S/ 9.61 S/ 9.30 S/ 9.30 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCB Mount	SOP-4		MOSFET
Solid State Relays - PCB Mount DC Only Single Pole i4-PAC CPC1708J IXYS Integrated Circuits 1: S/ 75.05 492In Stock End of Life	Mfr. Part # CPC1708J Mouser Part # 849-CPC1708J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount DC Only Single Pole i4-PAC Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	492In Stock	S/ 75.05 S/ 66.87 S/ 63.80 S/ 61.62 View S/ 59.52 S/ 56.25 S/ 54.30 Quote	Min.: 1 Mult.: 1	PCB Mount	i4-PAC		MOSFET
Solid State Relays - PCB Mount 250V Single Pole DC Power Relay CPC1726Y IXYS Integrated Circuits 1: S/ 32.66 572In Stock End of Life	Mfr. Part # CPC1726Y Mouser Part # 849-CPC1726Y End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 250V Single Pole DC Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	572In Stock	S/ 32.66 S/ 30.60 S/ 27.21 S/ 25.85 View S/ 24.48 S/ 22.85 S/ 22.07 S/ 21.29	Min.: 1 Mult.: 1	PCB Mount	i4-PAC		MOSFET
Solid State Relays - PCB Mount 8Pin Single Pole NOR Mally Open SS Relay CPC1907B IXYS Integrated Circuits 1: S/ 46.79 12,617In Stock 17,625Expected 2/12/2027 End of Life	Mfr. Part # CPC1907B Mouser Part # 849-CPC1907B End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 8Pin Single Pole NOR Mally Open SS Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	12,617In Stock 17,625Expected 2/12/2027	S/ 46.79 S/ 41.65 S/ 39.63 S/ 37.91 View S/ 36.36 S/ 34.72 S/ 33.51 S/ 32.39 Quote	Min.: 1 Mult.: 1	PCB Mount	SOIC-8		MOSFET
Solid State Relays - PCB Mount 5 A 500 V Optic Iso Pwr Sol State Relay CPC1968J IXYS Integrated Circuits 1: S/ 176.60 921In Stock 375On Order End of Life	Mfr. Part # CPC1968J Mouser Part # 849-CPC1968J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 5 A 500 V Optic Iso Pwr Sol State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	921In Stock 375On Order On Order Ship Dates Mfr. #: CPC1968J Stock: 921 Can Ship Immediately On Order: 175 Expected 11/4/2026 200 Expected 11/30/2026 Factory Lead-Time: 54 Weeks	S/ 176.60 S/ 165.31 S/ 150.17	Min.: 1 Mult.: 1	PCB Mount	ISOPLUS264		MOSFET
Solid State Relays - PCB Mount 600V AC/DC 1-FORM-A ENHANCED ISO PSIP CPC1984Y IXYS Integrated Circuits 1: S/ 67.50 3,785In Stock End of Life	Mfr. Part # CPC1984Y Mouser Part # 849-CPC1984Y End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 600V AC/DC 1-FORM-A ENHANCED ISO PSIP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	3,785In Stock	S/ 67.50 S/ 60.14 S/ 57.41 S/ 55.43 View S/ 53.41 S/ 50.56 S/ 48.81 Quote	Min.: 1 Mult.: 1	PCB Mount	SIP-4		MOSFET
Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole LAA110LSTR IXYS Integrated Circuits 1: S/ 34.95 698In Stock End of Life	Mfr. Part # LAA110LSTR Mouser Part # 849-LAA110LSTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 350V 120mA Dual Single-Pole Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	698In Stock	Cut Tape S/ 34.95 S/ 31.18 S/ 29.78 S/ 28.73 Reel S/ 24.48 View S/ 27.75 S/ 26.27 S/ 25.38 S/ 23.08 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-8		MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA110L IXYS Integrated Circuits 1: S/ 17.05 1,116In Stock End of Life	Mfr. Part # LCA110L Mouser Part # 849-LCA110L End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,116In Stock	S/ 17.05 S/ 15.88 S/ 15.18 S/ 14.67 View S/ 14.17 S/ 13.23 S/ 12.65 S/ 12.38 S/ 11.17	Min.: 1 Mult.: 1	PCB Mount	DIP-6		MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA LCA110STR IXYS Integrated Circuits 1: S/ 15.84 11,199In Stock 4,000Expected 1/13/2027 End of Life	Mfr. Part # LCA110STR Mouser Part # 849-LCA110STR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 350V 120mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	11,199In Stock 4,000Expected 1/13/2027	Cut Tape S/ 15.84 S/ 14.13 S/ 13.51 S/ 13.00 Reel S/ 10.90 View S/ 12.53 S/ 11.99 S/ 11.56 S/ 10.78 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-6		MOSFET
Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA LCA127STR IXYS Integrated Circuits 1: S/ 26.94 1,404In Stock End of Life	Mfr. Part # LCA127STR Mouser Part # 849-LCA127STR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 250V 200mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,404In Stock	Cut Tape S/ 26.94 S/ 24.02 S/ 22.93 S/ 22.15 Reel S/ 18.92 View S/ 21.41 S/ 20.36 S/ 19.66 S/ 18.37 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	PCB Mount	SMD DIP-6		MOSFET
Solid State Relays - PCB Mount 8-Pin Power SOIC CPC1966B IXYS Integrated Circuits 1: S/ 38.22 1,905In Stock 1,725Expected 3/24/2027	Mfr. Part # CPC1966B Mouser Part # 849-CPC1966B	IXYS Integrated Circuits	Solid State Relays - PCB Mount 8-Pin Power SOIC Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,905In Stock 1,725Expected 3/24/2027	S/ 38.22 S/ 34.06 S/ 32.50 S/ 31.37 View S/ 30.24 S/ 28.30 S/ 27.71 S/ 27.01	Min.: 1 Mult.: 1	PCB Mount	ISOPLUS264		SCR
Solid State Relays - PCB Mount AC Switch 3A, 600V CPC1966Y IXYS Integrated Circuits 1: S/ 33.48 394In Stock 7,650Expected 11/23/2026	Mfr. Part # CPC1966Y Mouser Part # 849-CPC1966Y	IXYS Integrated Circuits	Solid State Relays - PCB Mount AC Switch 3A, 600V Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	394In Stock 7,650Expected 11/23/2026	S/ 33.48 S/ 29.82 S/ 27.60 S/ 26.74 View S/ 25.57 S/ 24.56 S/ 24.02 S/ 23.55	Min.: 1 Mult.: 1	PCB Mount	SIP-4		SCR
Triac & SCR Output Optocouplers 600V Single Pole SIP Power Relay CPC1976Y IXYS Integrated Circuits 1: S/ 30.09 946In Stock 5,925On Order	Mfr. Part # CPC1976Y Mouser Part # 849-CPC1976Y	IXYS Integrated Circuits	Triac & SCR Output Optocouplers 600V Single Pole SIP Power Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	946In Stock 5,925On Order On Order Ship Dates Mfr. #: CPC1976Y Stock: 946 Can Ship Immediately On Order: 1,825 Expected 11/4/2026 4,100 Expected 1/8/2027 Factory Lead-Time: 23 Weeks	S/ 30.09 S/ 24.76 S/ 21.56 S/ 20.16 View S/ 19.46 Quote	Min.: 1 Mult.: 1	Through Hole	SIP-4	1 Channel	PhotoSCR
Solid State Relays - PCB Mount 1-Form-A 60V 1000 mA SSR w/optic MOSFET LCA712S IXYS Integrated Circuits 1: S/ 43.21 283In Stock	Mfr. Part # LCA712S Mouser Part # 849-LCA712S	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 1000 mA SSR w/optic MOSFET Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	283In Stock	S/ 43.21 S/ 38.50 S/ 36.78 S/ 35.50 View S/ 34.10 S/ 32.58 S/ 31.45 S/ 29.51 Quote	Min.: 1 Mult.: 1	PCB Mount			MOSFET
Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET LCA715 IXYS Integrated Circuits 1: S/ 46.67 833In Stock	Mfr. Part # LCA715 Mouser Part # 849-LCA715	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 2200mA SSR w/optic MOSFET Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	833In Stock	S/ 46.67 S/ 41.53 S/ 39.55 S/ 37.80 View S/ 36.24 S/ 34.60 S/ 33.44 S/ 32.27 Quote	Min.: 1 Mult.: 1	PCB Mount	DIP-6		MOSFET

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